Shortly after Bob's passing news emerged, multiple stars took to social media sites to pay tribute to the late actor.

His Curb co-star Richard Lewis said he was in shock about Bob's death, writing on Twitter,

I knew him forever. His long career is hard to match. His role on #curbyourenthusiasm was excruciatingly brilliant! Our cast and crew will be devastated. He was so loved. He told me how much he loved LD and Curb. RIP buddy.

Take a look!

I’m in shock.I knew him forever. to his loved ones. His long career is hard to match. His role on #curbyourenthusiasm was excruciatingly brilliant! Our cast and crew will be devastated.He was so loved. He told me how much he loved LD and Curb. RIP buddy. ⁦@HBO⁩ pic.twitter.com/G8f5PoffuF